<?php defined('SYSPATH') or die('No direct script access.');

/**
 * 校验处理类
 */
class St_Validate{

    /**
     * 判断email格式是否正确
     * @param $email
     */
    public static function is_email($email)
    {
        return strlen($email) > 6 && preg_match("/^[\w\-\.]+@[\w\-\.]+(\.\w+)+$/", $email);
    }

    /**
     * @function 验证是否是身份证号码
     * @param $value
     * @param string $pattern
     * @return bool|int
     */
    public static function is_idcard($value,$pattern='/^d{6}((1[89])|(2d))d{2}((0d)|(1[0-2]))((3[01])|([0-2]d))d{3}(d|X)$/i')
    {
        if(!$value) return false;
        else if(strlen($value)>18) return false;
        return preg_match($pattern,$value);
    }

    /**
     * @function 验证是否是手机号码
     * @param $value
     * @param string $pattern
     * @return bool|int
     */
    static function is_mobile($value,$pattern='/^(0)?1([1|2|3|4|5|6|7|8|9])+([0-9]){9,10}$/')
    {
        //支持国际版：([0-9]{1,5}|0)?1([3|4|5|8])+([0-9]){9,10}
        if(!$value) return false;
        return preg_match($pattern,$value);
    }

    /**
     * @function 验证是否是字母
     * @param $str
     * @return int
     */
    static function is_letter($str)
    {
        $pattern ='/^[a-zA-Z]+$/';
        return preg_match($pattern,$str);
    }

    /**
     * @function 身份证号码获取性别
     * @param $value
     * @return bool|int
     */
    public static function idcard_sex($value)
    {
        $sexint = (int)substr($value,16,1);
        return $sexint % 2 === 0 ? 2 : 1;
    }

    /**
     * @function 身份证号码获取生日
     * @param $value
     * @return bool|int
     */
    public static function idcard_birth($value)
    {
        $birthday =  strtotime(substr($value, 6, 8));
        $birthday = date('Y-m-d', $birthday);
        return $birthday;
    }



    /**
     * @function  验证身份证，并返回出生日期,星座,性别
     * @param $idcard
     *
     */
    public static function check_idcard($idcard)
    {
        $City = array(11 => "北京", 12 => "天津", 13 => "河北", 14 => "山西", 15 => "内蒙古", 21 => "辽 宁", 22 => "吉林", 23 => "黑龙江", 31 => "上海", 32 => "江苏", 33 => "浙江", 34 => " 安徽", 35 => "福建", 36 => "江西", 37 => "山东", 41 => "河南", 42 => "湖北", 43 => " 湖南", 44 => "广东", 45 => "广西", 46 => "海南", 50 => "重庆", 51 => "四川", 52 => " 贵州", 53 => "云南", 54 => "西藏", 61 => "陕西", 62 => "甘肃", 63 => "青海", 64 => " 宁夏", 65 => "新疆", 71 => "台湾", 81 => "香港", 82 => "澳门", 91 => "国外");
        $idCardLength = strlen($idcard);
        //长度验证
        if (!preg_match('/^\d{17}(\d|x)$/i', $idcard) and !preg_match('/^\d{15}$/i', $idcard))
        {
            return false;
        }
        //地区验证
        if (!array_key_exists(intval(substr($idcard, 0, 2)), $City))
        {
            return false;
        }
        // 15位身份证验证生日，转换为18位
        if ($idCardLength == 15)
        {
            $sBirthday = '19' . substr($idcard, 6, 2) . '/' . substr($idcard, 8, 2) . '/' . substr($idcard, 10, 2);
            $d = new DateTime($sBirthday);
            $dd = $d->format('Y/m/d');
            if ($sBirthday != $dd)
            {
                return false;
            }
            $sex_num = substr($idcard, 13, 1);
            $idcard = substr($idcard, 0, 6) . "19" . substr($idcard, 6, 9);//15to18
            $Bit18 = self::_get_verifyBit($idcard);//算出第18位校验码
            $idcard = $idcard . $Bit18;
        }
        // 判断是否大于当前年份，小于1900年
        $year = substr($idcard, 6, 4);
        if ($year < 1900 || $year > date('Y', time()))
        {
            return false;
        }
        //18位身份证处理
        $sBirthday = substr($idcard, 6, 4) . '/' . substr($idcard, 10, 2) . '/' . substr($idcard, 12, 2);
        $d = new DateTime($sBirthday);
        $dd = $d->format('Y/m/d');
        if ($sBirthday != $dd)
        {
            return false;
        }
        //身份证编码规范验证
        $idcard_base = substr($idcard, 0, 17);
        if (strtoupper(substr($idcard, 17, 1)) != self::_get_verifyBit($idcard_base))
        {
            return false;
        }
        if (!isset($sex_num))
        {

            $sex_num = substr($idcard, 16, 1);
        }
        if ($sex_num % 2 == 0)
        {
            $sex = '女';
        }
        else
        {
            $sex = '男';
        }
        $constellation = self::_get_constellation_by_birth($sBirthday);
        return array(
            'birth_date' => $sBirthday,
            'sex' => $sex,
            'constellation' => $constellation
        );

    }


    /**
     * @function 根据生日返回星座
     */
    private static function _get_constellation_by_birth($birth_date)
    {
        $constell_date = date('md', strtotime($birth_date));
        switch (true)
        {
            case $constell_date < '0219';
                $constellation = '水瓶座';
                break;
            case $constell_date < '0321';
                $constellation = '双鱼座';
                break;
            case $constell_date < '0420';
                $constellation = '白羊座';
                break;
            case  $constell_date < '0521';
                $constellation = '金牛座';
                break;
            case  $constell_date < '0622';
                $constellation = '双子座';
                break;
            case  $constell_date < '0723';
                $constellation = '巨蟹座';
                break;
            case $constell_date < '0823';
                $constellation = '狮子座';
                break;
            case  $constell_date < '0923';
                $constellation = '处女座';
                break;
            case  $constell_date < '1024';
                $constellation = '天秤座';
                break;
            case  $constell_date < '1123';
                $constellation = '天蝎座';
                break;
            case  $constell_date < '1222';
                $constellation = '射手座';
                break;
            default:
                $constellation = '摩羯座';

        }

        return $constellation;
    }


    // 计算身份证校验码，根据国家标准GB 11643-1999
    private static function _get_verifyBit($idcard_base)
    {
        if (strlen($idcard_base) != 17)
        {
            return false;
        }
        //加权因子
        $factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
        //校验码对应值
        $verify_number_list = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
        $checksum = 0;
        for ($i = 0; $i < strlen($idcard_base); $i++)
        {
            $checksum += substr($idcard_base, $i, 1) * $factor[$i];
        }
        $mod = $checksum % 11;
        $verify_number = $verify_number_list[$mod];
        return $verify_number;
    }

    

}